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| author | Richard Earnshaw <richard.earnshaw@arm.com> | 2002-02-15 16:12:24 +0000 |
|---|---|---|
| committer | Richard Earnshaw <richard.earnshaw@arm.com> | 2002-02-15 16:12:24 +0000 |
| commit | 66e810cd098c57a4483f33cedc272486506eb485 (patch) | |
| tree | 4f63c94878bbbe7303466f05708c5915015e2c33 /gdb/arm-linux-tdep.c | |
| parent | 97e03143bb83533b4cf4fcd9d283b05722b4c128 (diff) | |
| download | binutils-gdb-66e810cd098c57a4483f33cedc272486506eb485.tar.gz | |
* arm-tdep.h (struct gdbarch_tdep): Add fields for breakpoint
descriptions.
* arm-tdep.c (arm_default_arm_le_breakpoint)
(arm_default_arm_be_breakpoint, arm_default_thumb_le_breakpoint)
(arm_default_thumb_be_breakpoint): New. Initialize them from
traditional breakpoint defines.
(arm_breakpoint_from_pc): Use new gdbarch_tdep entries.
(arm_gdbarch_init): Initialize new breakpoint variables.
* arm-linux-tdep.c (arm_linux_arm_le_breakpoint): New.
(arm_linux_init_abi): Initialize linux-specific breakpoint.
* armnbsd-tdep.c (arm_nbsd_arm_le_breakpoint): New.
(arm_netbsd_aout_init_abi, arm_netbsd_elf_init_abi): Split common
code out to ...
(arm_netbsd_init_abi_common): ... here; new function.
* config/arm/tm-arm.h (ARM_LE_BREAKPOINT, ARM_BE_BREAKPOINT)
(THUMB_LE_BREAKPOINT, THUMB_BE_BREAKPOINT): Delete.
* config/arm/tm-linux.h (ARM_LE_BREAKPOINT): Delete.
* config/arm/tm-nbsd.h (ARM_LE_BREAKPOINT): Delete.
Diffstat (limited to 'gdb/arm-linux-tdep.c')
| -rw-r--r-- | gdb/arm-linux-tdep.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index ac2f8e0542b..6049cf53a8e 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -35,6 +35,15 @@ #include "symfile.h" #include "objfiles.h" +/* Under ARM Linux the traditional way of performing a breakpoint is to + execute a particular software interrupt, rather than use a particular + undefined instruction to provoke a trap. Upon exection of the software + interrupt the kernel stops the inferior with a SIGTRAP, and wakes the + debugger. Since ARM Linux is little endian, and doesn't support Thumb + at the moment we only override the ARM little-endian breakpoint. */ + +static const char arm_linux_arm_le_breakpoint[] = {0x01,0x00,0x9f,0xef}; + /* CALL_DUMMY_WORDS: This sequence of words is the instructions @@ -537,6 +546,8 @@ arm_linux_init_abi (struct gdbarch_info info, struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); tdep->lowest_pc = 0x8000; + tdep->arm_breakpoint = arm_linux_arm_le_breakpoint; + tdep->arm_breakpoint_size = sizeof (arm_linux_arm_le_breakpoint); } void |